Using the Traefik Ingress Controller
- Example Steps: Traefik Ingress Controller

Using the Traefik Ingress Controller

Rancher Desktop uses K3s under the hood, which in turn uses Traefik as the default Ingress controller for your Kubernetes cluster. As an example, the below steps outline creating simple services that can be routed by the Ingress object.

Example Steps: Traefik Ingress Controller

Linux
macOS
Windows

Open a bash session and set the node IP to your localhost address:

IP=127.0.0.1

Create a namespace called demo:

kubectl create ns demo

Create a whoami example with basic deployment, service, and Ingress objects defined:

备注

Some Linux distributions don’t allow listening to priviliged ports by default, please see the documentation on Traefik port binding access to authorize ports if necessary.

cat << EOF | kubectl apply -n demo -f -
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: whoami
  name: whoami
spec:
  replicas: 1
  selector:
    matchLabels:
      app: whoami
  template:
    metadata:
      labels:
        app: whoami
    spec:
      containers:
        - image: traefik/whoami:latest
          name: whoami
          ports:
            - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: whoami-svc
spec:
  type: ClusterIP
  selector:
    app: whoami
  ports:
    - port: 80
---    
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: whoami-http
  annotations:
    traefik.ingress.kubernetes.io/router.entrypoints: web
spec:
  rules:
    - host: whoami.$IP.sslip.io
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: whoami-svc
                port:
                  number: 80
EOF

Verify the ingress works by calling curl:

curl whoami.$IP.sslip.io
Hostname: whoami-6ff6dcfdc8-74mwq
IP: 127.0.0.1
IP: ::1
IP: 10.42.0.42
IP: fe80::e804:41ff:feac:7eef
RemoteAddr: 10.42.0.45:35392
GET / HTTP/1.1
Host: whoami.127.0.0.1.sslip.io
User-Agent: curl/7.64.1
Accept: */*
Accept-Encoding: gzip
X-Forwarded-For: 10.42.0.1
X-Forwarded-Host: whoami.127.0.0.1.sslip.io
X-Forwarded-Port: 80
X-Forwarded-Proto: http
X-Forwarded-Server: traefik-d497b4cb6-4vkg9
X-Real-Ip: 10.42.0.1

Delete the resources:

kubectl delete all,ingress --all -n demo

Open a bash session and set the node IP to your localhost address:

Default
socket-vmnet Enabled

IP=127.0.0.1

IP=`kubectl get node/lima-rancher-desktop -o jsonpath='{.status.addresses[?(@.type=="ExternalIP")].address}'`

Create a namespace called demo:

kubectl create ns demo

Create a whoami example with basic deployment, service, and Ingress objects defined:

cat << EOF | kubectl apply -n demo -f -
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: whoami
  name: whoami
spec:
  replicas: 1
  selector:
    matchLabels:
      app: whoami
  template:
    metadata:
      labels:
        app: whoami
    spec:
      containers:
        - image: traefik/whoami:latest
          name: whoami
          ports:
            - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: whoami-svc
spec:
  type: ClusterIP
  selector:
    app: whoami
  ports:
    - port: 80
---    
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: whoami-http
  annotations:
    traefik.ingress.kubernetes.io/router.entrypoints: web
spec:
  rules:
    - host: whoami.$IP.sslip.io
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: whoami-svc
                port:
                  number: 80
EOF

Verify the ingress works by calling curl:

curl whoami.$IP.sslip.io
Hostname: whoami-6ff6dcfdc8-74mwq
IP: 127.0.0.1
IP: 10.42.0.4
RemoteAddr: 10.42.0.250:54102
GET / HTTP/1.1
Host: whoami.127.0.0.1.sslip.io
User-Agent: curl/8.1.1
Accept: */*
Accept-Encoding: gzip
X-Forwarded-For: 10.42.0.246
X-Forwarded-Host: whoami.127.0.0.1.sslip.io
X-Forwarded-Port: 80
X-Forwarded-Proto: http
X-Forwarded-Server: traefik-64b96ccbcd-26wcv
X-Real-Ip: 10.42.0.246

Delete the resources:

kubectl delete all,ingress --all -n demo

Open a powershell session and set the node IP to your local address:

$IP = (kubectl get node/$env:COMPUTERNAME -o=jsonpath="{range .status.addresses[?(@.type == 'InternalIP')]}{.address}{end}")

Create a namespace called demo:

kubectl create ns demo

Create a whoami example with basic deployment, service, and Ingress objects defined:

echo @"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: whoami
  name: whoami
spec:
  replicas: 1
  selector:
    matchLabels:
      app: whoami
  template:
    metadata:
      labels:
        app: whoami
    spec:
      containers:
        - image: traefik/whoami:latest
          name: whoami
          ports:
            - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: whoami-svc
spec:
  type: ClusterIP
  selector:
    app: whoami
  ports:
    - port: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: whoami-http
  annotations:
    traefik.ingress.kubernetes.io/router.entrypoints: web
spec:
  rules:
    - host: whoami.$IP.sslip.io
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: whoami-svc
                port:
                  number: 80
"@ | kubectl apply -n demo -f -

Verify the ingress works by calling curl:

curl whoami.$IP.sslip.io

Delete the resources:

kubectl delete all,ingress --all -n demo